304831 has 2 divisors, whose sum is σ = 304832. Its totient is φ = 304830.

The previous prime is 304813. The next prime is 304847. The reversal of 304831 is 138403.

Together with previous prime (304813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (138403) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304831 is a prime.

It is a super-2 number, since 2×304831² = 185843877122, which contains 22 as substring.

It is a Chen prime.

304831 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 304799 and 304808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152415 + 152416.

It is an arithmetic number, because the mean of its divisors is an integer number (152416).

2³⁰⁴⁸³¹ is an apocalyptic number.

304831 is a deficient number, since it is larger than the sum of its proper divisors (1).

304831 is an equidigital number, since it uses as much as digits as its factorization.

304831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 304831 is about 552.1150242477. The cubic root of 304831 is about 67.3007199727.

The spelling of 304831 in words is "three hundred four thousand, eight hundred thirty-one".